CVE-2026-63957 (GCVE-0-2026-63957)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
Title
USB: serial: safe_serial: fix memory corruption with small endpoint
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: serial: safe_serial: fix memory corruption with small endpoint Make sure that the bulk-out buffer size is at least eight bytes to avoid user-controlled slab corruption in "safe" mode should a malicious device report a smaller size.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e3a1d6eee25dc96b1d2db0ecd9d8741e92056476 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c7336c0fba5c959249f3d793d33076b992ec3ee4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 161ea0e5236f5f051d2d85d6c54dd08ee9dc7ba4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9b3145b3001fb24de1da72d1deb0bea70e5a078b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a550ed2117ca4709d38f713933ff924a83942e41 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f793b67d41e5fab719c5a90baa77cbd2fe259517 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 857b3cc73f91871ae4433f8b97c4670b78f8dc96 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 438061ed1ad85e6743e2dce826671772d81089ec (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/safe_serial.c"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: safe_serial: fix memory corruption with small endpoint\n\nMake sure that the bulk-out buffer size is at least eight bytes to avoid\nuser-controlled slab corruption in \"safe\" mode should a malicious device\nreport a smaller size."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:48.196Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "cveId": "CVE-2026-63957",
    "datePublished": "2026-07-19T14:55:48.196Z",
    "dateReserved": "2026-07-19T07:54:57.023Z",
    "dateUpdated": "2026-07-19T14:55:48.196Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-07-21",
      "epss": "0.0021",
      "percentile": "0.11356"
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  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.